119th General Meeting of the KCS

Type Poster Presentation
Area 재료화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code MAT.P-330
Subject Structurally Controlled Electrum Nanostructures for Catalystic and SERS Applications
Authors 오주환, 이재승*
고려대학교 신소재공학부, Korea
Abstract Bimetallic gold/silver nanostructures, or ‘electrum’ nanostructures have attracted particular attention because they not only retain the characteristics of both pure gold (Au) and silver (Ag) nanostructures but also exhibit enhanced chemical and physical properties owing to synergic combination of both characteristics resulting from monometallic nanostructures. In order to obtain desired chemical and physical properties, controlling the morphologies of bimetallic Au/Ag nanostructures has been of significant interest owing to their structure-dependent chemical and physical properties. To date, the synthesis of various bimetallic nanostructures including wire, rod, plate, frame, hollow, and core-shell structures have been demonstrated. These nanostructures, however, are typically limited to simple structures which were already widely investigated with monometallic nanostructures. Bimetallic Au/Ag nanostructures with high complexity are highly expected to extend the understanding for controlling the morphologies of bimetallic nanostructures. In this work, we demonstrate in-plate and on-plate structural control of Au/Ag bimetallic nanoplates (Au/Ag BNPLs). The Au/Ag BNPLs exhibit high chemical stability, and are utilized as redox catalysts for various catalytic reactions. Significantly, the Au/Ag BNPLs exhibit reversible assembly properties through surface modification, demonstrating the potential for diagnostic applications. Finally, the surface-enhanced Raman scattering (SERS) properties of the Au/Ag BNPLs are investigated as single nanoparticle SERS probes. electron microscopy, UV-vis spectroscopy, selected area electron diffraction, and energy dispersive X-ray spectroscopy are employed to analyze the structure and composition of the Au/Ag BNPLs at the atomic level.
E-mail ssss@korea.ac.kr